Nonlinear analysis of bolted joint using single degree of freedom model

Abstract

Bolted joints are widely used in assembled structures. An introduction of a joint induces nonlinearity due to the presence of friction at interface. To understand the nonlinear characteristics of a bolted joint under dynamic loading, nonlinear parameters are identified based on equivalent single degree of freedom model of assembled beams with a joint. Subsequently, the governing equation is solved to obtain modulation equation using multiple scale method. Nonlinear analysis is done by analysing frequency response curves at different nonlinear parameters of bolted joint. The developed model can be used to identify bolted joint response with change in its preload.